Improvement in welt and thread cutters for sewing-machines



UNITED STATES PATENT OFFICE.

HANNIBAL FOLSOM, OF MILFORD, MASSACHUSETTS.

. IMPROVEMENT IN WELT AND THREAD CUTTERS FORSEWING-MACHINES.

Specification forming part of Letters Patent No. 42,846, dated May `24, 1,864.

To all whom it may coincer-n: 1

Be it known that I, HANNIBAL FOLSOM, of Milford, in the county of Worcester and State of Massachusetts, have invented a new andnseful Improvement in Sewing-lilachncs; and I do hereby declare that the following, taken in connection with the drawing which accomg panies and forms part of this specification, is a description of my invention sufficient to cnable those skilled in the art to practice it.

This invention is principally applicable` to that class ofsewing-rnachines employed on boot land shoe work; and the improvement consists in the arrangement of a thread-knife below the table or work-plate ofthe machine and a weltknif'e above said table-plate, to operate in conjunction to simultaneously sever the weltand thread, as will be hereinafter described; also, in the manner of applying the welt holder or guide, and in the mechanism for adjustingthe welt-gage.

The accompanying drawing shows'the application of my' invention to the table-plate of a t sewing-machine, or to what is known inoue' class of the well-known Townsend wax-thread machine as the post, all the mechanism crnbodying my improvement being applied to the upper and lower sides of this plate.

a denotes the table-plate, iixed to the top of a post or standard, b..

c is a horizontal arm, turning on a screw or pin,td, and having at its front end the gage e, against which the boot-leg or work being sewed and the welt are held. An extensiomf, from this arm has a lip, vg, against which an adj nsting-screw, h, anda leaf-springt', operate. The

' spring serves to hold the gage in position, as

-will be readily understood, while by turning the screw h the gage e is fed up or back, so as to regulate the distauces'between the row of stitches andthe edge of .the work abutting against the ga'ge. The welt L' passes through a guide, l, so arranged .with respect to the table and the groovem, through which the needle works,as to deliver the welt in proper position to or between the work in which the'welt is to he stitched. This guide is shown as applied to a projection from the post by a hinge,n, by means ot' which the guide can be turned up from the tahleplate intoa vertical position,as

denoted by the red lines, so as to be readily thrown out of the path of the work when itis fastened to a stud, p, projecting from a lever,V g, (placed beneath the tab1e,) through a slot,l

t, in the table. This lever turns on a pin or stud, s, and by application of the hand to a knob, t, the lever is so turned as to actuate the pills and impel the knife o forward against,

and so as to sever the welt. A cogged sector,

y, is made upon or applied to the inner end ofI the lever q. This sector meshes into and operates a cogged sector, mon the end of alever,

17, which turns on a fulcruin or pin, w. A.

knife, m, projects from the other end of this le ver, the cutting-edgc'of said knife extending "intojuxtaposition with the vertical path of the needle and threadgand so that when the weltknife ois throwntbrward by the lever q to' sever the weltthe sector y actuates the lever v, throws the knife o back, and severs the thread,`thetwo operations beingsimultaneous, as will be understood from the drawing. After the knives have thus operated and the knob t is released, a spring, e, draws back the opposite ends of the two levers q a and brings the knives` into their normal position. By the arrangementof the welt-knife within the lever` q, and so as to be projected at proper times from the face of the gage to out the welt, I ain enabled to employ the knife' on top ofthe plate without its being in a position to injure or lcut the work from' contact therewith while themachine is operating, and by the-employment of the two knives to operate above and below the .plate a and simultaneously, asset forth, the

machine can be run with speed onto successive pieces of work, as it i's not necessary to turn the work'over to get at the welt or .to use fr knife by hand under the machine to cut the thread.

I am aware that i't is not new to attach a threadcutter to and so as to form part of a sewing-machine, suoli an arrangement being shown in Patent No. 16,713, and my improvement heilig made to be used under said patent.

1. am .also aware that it ,is not.new to coni- 'hine a welt guide with a sewing-machine or with an edge-gagmas such have been before used.

WhatI claint is- A y 1. The'arrangcmentiof a welt cutter or knife with the thread-Knife, to cui; the thread elow vslmntially as specified. j said plate in themanne'r substantially as set 4. The combination of the sprii1gz,ar1nsj,

to operate above the plate af, in eonju ction or holder bv the hinge or its' equivalent, sb-

lorth. and screw h, for operating the edge-guide e. 2. The application of the knife so as to lie within the gage or lever, as shown, excepting HANNIBAL FOLSOM.-

when'projeeted therefrom, as and for the pur-' Witnesses:

pose described. V J.B. CROSBY, y

3. The manner of applying' tbewelt; guide FRANCIS GOULD. 

